WO2019017197A1 - Valve device and canister - Google Patents

Abstract

According to the present invention, a purge valve (3) is provided with: a housing (31) which accommodates a coil and a valve body, and in which an inlet port (310) and an outlet port (311) are provided; and a bracket (4) and a bolt (6) which integrally fix the housing to the canister (13). The inlet port is a part having an inlet passage through which evaporation fuel desorbed from the canister is introduced, and is connected, but not through piping, to a fuel discharge part (130a) provided in the canister. The outlet port has an outlet passage through which the evaporation fuel from the inlet port is discharged in a permitted state and not discharged in a blocked state. Accordingly, the present invention can reduce the number of pipes with regard to paths connecting an engine intake pipe and the canister.

Description

Valve device and canister Cross-reference to related applications

The present application is based on Japanese Patent Application No. 2017-138666 filed on July 17, 2017, and Japanese Patent Application No. 2018 filed on June 15, 2018, the disclosure contents of which are incorporated by reference into the present application. It is based on -114697.

The present disclosure relates to a valve device and a canister that can control the supply of evaporated fuel to an engine.

Patent Document 1 discloses an evaporative fuel processing apparatus in which a canister, a pressure pump, and a purge valve are provided from the upstream side on a purge passage extending from a fuel tank to an engine intake pipe. The purge valve is provided on the upstream side of the engine intake pipe in the purge passage, and adjusts the supply flow rate of the evaporative fuel flowing out of the canister to the engine intake pipe according to the opening degree thereof.

JP, 2017-67006, A

In the evaporative fuel processing apparatus of Patent Document 1, a fuel supply pipe connecting a canister and a purge valve, and a fuel supply pipe connecting a purge valve and an engine intake pipe are provided. In the fuel supply pipe, parts are needed to prevent the evaporative fuel from leaking to the outside. In particular, since the fuel supply pipe connecting the canister and the purge valve stores the evaporative fuel when the purge valve is closed, a reliable leak prevention component is required at the pipe connection. On the other hand, reduction of the number of parts is required as the whole fuel vapor processing system.

An object of the present disclosure is to provide a valve device and a canister capable of reducing the number of piping with respect to a path connecting an engine intake pipe and a canister.

According to one aspect of the present disclosure, the valve device is a portion internally having an inflow passage into which the evaporated fuel desorbed from the canister flows, and is connected to the evaporated fuel outflow portion provided in the canister without piping. A possible inflow port, a valve body driven by an electromagnetic force generated by energization of a coil, and switched between a permitted state for permitting vaporized fuel from the inflow port to flow and a blocked state for preventing the evaporated fuel from flowing; A fixed part that integrally fixes the main body to the canister, containing the outflow port in which the evaporative fuel from the fuel flows out in the permitted state, the coil and the valve body, and the main body provided with the inflow port and the outflow port. A device.

According to this valve device, since the inflow port can be connected to the evaporative fuel outflow portion of the canister without a pipe, the fuel supply pipe connecting the canister and the valve device can be omitted. Therefore, it is possible to provide a valve device capable of reducing the number of pipings in the path connecting the engine intake pipe and the canister. Furthermore, since the fixing device integrally fixes the main body to the canister, the heat generated by the coil can be thermally transferred to the canister through the main body. This can provide a valve device capable of promoting desorption of the fuel vapor by the effect of warming the canister.

According to one aspect of the present disclosure, the canister integrally comprises the aforementioned valve arrangement. According to this canister, heat generation of the valve device can be thermally transferred to the canister through the bracket, and a canister capable of promoting desorption of the evaporated fuel can be provided.

FIG. 1 is a schematic view showing an evaporated fuel purge system according to a first embodiment. It is a sectional view showing the composition of the purge valve of a 1st embodiment. It is the front view made into a partial section showing the state which fixed a purge valve to a canister. It is a top view which shows the state which fixed the purge valve to the canister. It is a top view of a bracket. It is a side view of a bracket. It is a front view of a bracket. It is sectional drawing which shows the structure of the purge valve of 2nd Embodiment. It is the side view made the partial section showing the state which fixed the purge valve to the canister. It is a top view which shows the state which fixed the purge valve of 3rd Embodiment to the canister. It is the front view made into the partial section which shows the state which fixed the purge valve of a 4th embodiment to a canister. It is a top view which shows the state which fixed the purge valve to the canister. It is the side view made into the partial section which shows the state which fixed the purge valve to a canister about a 4th embodiment. It is the fragmentary sectional view which looked at the XIV-XIV cut surface in FIG. 13 in the arrow. It is a top view which shows the state which fixed the purge valve to the canister.

Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. The same referential mark may be attached | subjected to the part corresponding to the matter demonstrated by the form preceded in each form, and the overlapping description may be abbreviate | omitted. When only a part of the configuration is described in each form, the other forms described above can be applied to other parts of the configuration. Not only combinations of parts which clearly indicate that combinations are possible in each embodiment, but also combinations of embodiments even if they are not specified unless there is a problem with the combination. Is also possible.

First Embodiment
The first embodiment will be described with reference to FIGS. 1 to 7. The evaporative fuel purge system 1 shown in FIG. 1 supplies HC gas and the like in the fuel adsorbed to the canister 13 to the intake passage of the engine, and prevents the evaporative fuel from the fuel tank 10 from being released to the atmosphere. It is also a system that The evaporated fuel purge system 1 may be described as the system 1 below. The system 1 includes an intake system of the engine 2 constituting an intake passage of the engine 2 and an evaporated fuel purge system for supplying the evaporated fuel to the intake system of the engine 2.

The evaporated fuel introduced into the intake passage of the engine 2 is mixed with the fuel for combustion supplied from the injector or the like to the engine 2 and burned in the cylinder of the engine 2. The engine 2 mixes and burns at least the evaporated fuel desorbed from the canister 13 and the fuel for combustion. The intake system of the engine 2 is configured by connecting an intake pipe 21 to an intake manifold 20 and further providing a throttle valve 25, an air filter 24 and the like in the middle of the intake pipe 21. The intake passage of the engine 2 is a passage including an intake manifold 20, an intake pipe 21, a throttle valve 25, an air filter 24, and the like. The engine 2 is connected to an intake pipe 21 through which air taken into the combustion chamber flows and an exhaust pipe 23 through which exhaust gas discharged to the outside flows. An exhaust manifold 22 branched to a plurality of portions is connected to the exhaust pipe 23.

In the evaporated fuel purge system, the fuel tank 10 and the canister 13 are connected by piping constituting the vapor passage 14, and the canister 13 and the intake pipe 21 are connected via piping such as a hose constituting the purge passage 15 and the purge valve 3. It is done. The purge passage 15 includes the internal passage of the purge valve 3. The intake pipe 21 is an example of a passage forming member that forms an intake passage of the engine 2.

The air filter 24 is provided on the upstream side of the intake pipe 21 and captures dust, dirt, and the like in intake. The throttle valve 25 is an intake amount adjustment valve that adjusts an opening degree at an inlet portion of the intake manifold 20 to adjust an intake amount flowing into the intake manifold 20. The intake air passes through the intake passage in the order of the air filter 24 and the throttle valve 25 to flow into the intake manifold 20, and is mixed with the combustion fuel injected from the injector or the like so as to have a predetermined air fuel ratio. Be burned.

The fuel tank 10 is a container for storing fuel such as gasoline. The fuel tank 10 is provided with a refueling portion 111 that opens and closes a refueling port. When fueling the fuel tank 10, the fueling unit 111 is opened and fueling is performed, and when the fueling is completed, the fueling unit 111 is closed and the inside of the fuel tank 10 and the atmosphere are shut off. In the fuel tank 10, the outflow portion 110 is connected to the fuel inflow portion 131 of the canister 13 via a pipe that forms the vapor passage 14. The canister 13 is a container in which an adsorbent such as activated carbon is sealed, and the evaporated fuel generated in the fuel tank 10 is taken in via the vapor passage 14 and temporarily adsorbed on the adsorbent. The canister 13 is integrally provided with a valve module 12. The valve module 12 is provided on the lower wall portion 132 of the canister 13. The lower wall portion 132 is an introduction wall portion having an introduction passage for introducing the atmosphere into the canister 13.

The valve module 12 includes a canister close valve that opens and closes a suction unit for suctioning fresh air from the outside, and an internal pump that can release gas to the atmosphere and can suction the atmosphere. Prepare. The valve module 12 is an atmosphere introducing unit for introducing the atmosphere into the canister 13. The canister close valve is also referred to as CCV. By providing the CCV in the canister 13, atmospheric pressure can be applied in the canister 13. The canister 13 can easily desorb the evaporated fuel adsorbed on the adsorbent by the fresh air drawn in. The fuel adsorbed to the activated carbon is purged into the purge valve 3 from the fuel outflow portion 130 a provided on the upper wall portion 130 of the canister 13 as the evaporated fuel together with the air introduced into the inside of the canister 13. The fuel outlet 130 a is an evaporated fuel outlet provided in the canister 13. The upper wall portion 130 is an outflow wall portion for flowing the evaporated fuel toward the intake passage. Also, instead of the valve module 12, the always-opened air introduction portion can be replaced with the canister 13.

A purge valve 3 which constitutes a part of the purge passage 15 is integrally fixed to the canister 13. In the canister 13, the inflow port 310 of the purge valve 3 is connected to a fuel outlet 130a from which the evaporated fuel desorbed from the adsorbent flows out. The fuel outlet 130 a and the inflow port 310 are sealed by an O-ring disposed on the outer periphery of the inflow port 310. Therefore, the canister 13 and the purge valve 3 are directly connected without the piping. The lower wall portion 132 and the upper wall portion 130 of the canister 13 are in a positional relationship in which activated carbon faces each other. The other end of the pipe such as a hose connected to the outflow port 311 of the purge valve 3 is connected to the intake pipe 21.

The purge valve 3 which is an example of a valve device mounted on the canister 13 will be described with reference to FIGS. The purge valve 3 is a valve device having a valve body 34 that opens and closes the purge passage 15. The purge valve 3 is also a device capable of opening and closing a fuel supply passage provided inside the main body, and can permit and block the supply of the vaporized fuel from the canister 13 to the engine 2. The purge valve 3 is an electromagnetic valve device provided with an electromagnetic solenoid unit 32 that drives the valve body 34 using an electromagnetic force.

By switching the purge valve 3 between the energized state and the non-energized state, the opening degree is controlled from the fully open state to the fully closed state of the fuel supply passage. The purge valve 3 can be switched between the permitted state for permitting the vaporized fuel to flow into the intake passage of the engine 2 and the blocked state for preventing the evaporated fuel by being switched to the energized state and the de-energized state. The purge valve 3 moves the valve body 34 according to the difference between the electromagnetic force generated when the electric circuit having the coil 320 is energized and the biasing force of the spring 323, and separates the valve body 34 from the valve seat 313. Open the fuel supply passage. The valve body movement direction shown in each drawing indicates the direction in which the valve body 34 moves between the valve opening state and the valve closing state.

The purge valve 3 is, for example, opened so that when the voltage is not applied, the valve body 34 contacts the valve seat 313 to keep the fuel supply passage closed and opens the fuel supply passage when the voltage is applied. It is a normally closed valve device controlled to the state. The purge valve 3 can also be configured by an on-off valve that switches between the fully open state and the fully closed state, instead of the purge valve 3 whose opening degree can be adjusted. The control device controls the ratio of the on time to the time of one cycle formed by the on time and the off time of the energization, that is, the duty ratio to energize the coil 320. The purge valve 3 is also referred to as a duty control valve. By controlling the energization of the purge valve 3 as described above, the flow rate of the evaporated fuel flowing through the fuel supply passage can be adjusted.

The purge valve 3 includes a housing 31 forming a fuel supply passage. The housing 31 includes an inflow port 310 receiving the supply of the vaporized fuel from the canister 13 and an outflow port 311 connected to a pipe communicating with the intake pipe 21. The housing 31 includes an inflow passage 310a provided inside the inflow port 310, an outflow passage 311a provided inside the outflow port 311, and an intermediate passage 313a connecting the inflow passage 310a and the outflow passage 311a. Have. The intermediate passage 313 a is a passage provided inside the cylindrical portion formed in the housing 31. The valve seat 313 is a tip portion of this cylindrical portion. The inflow port 310 and the outflow port 311 project in opposite directions in the housing 31. Therefore, the inflow passage 310a and the outflow passage 311a are passages extending in opposite directions. The intermediate passage 313a intersects the inflow passage 310a and the outflow passage 311a. The inflow passage 310a and the outflow passage 311a communicate with each other through the intermediate passage 313a in the permitted state and are shut off in the blocked state.

The housing 31 is a main body portion of a valve device that accommodates the movable core 322, the valve body 34 integrally provided to the movable core 322, the spring 323, and the fixed core 321. The electromagnetic solenoid unit 32 includes a bobbin 312, a coil 320, a movable core 322, a fixed core 321, a spring 323, a connector 33, and the like.

The bobbin 312 is formed in a substantially cylindrical shape by a resin material as a part of the housing 31, and the coil 320 is wound around the outer peripheral surface thereof. The fixed core 321 is supported in a state of being fitted inside the bobbin 312.

The connector 33 includes a coil support portion 331 extending in a direction perpendicular to the terminal 330 from the root of the connector 33. The connector 33 is formed of resin. The connector 33 is a resin molded product having a terminal 330 for energizing the coil 320, and the terminal 330 protrudes from the inside to the outside. The terminal 330 is a conductive terminal electrically connected to the coil 320. The connector 33 is connected to a power-side connector for supplying power from the power supply unit or the current control device. When the connector 33 and the power supply side connector are connected and the terminal 330 is electrically connected to the current control device or the like, the electromagnetic solenoid unit 32 can control the current supplied to the coil 320.

The coil support portion 331 is coupled to the housing 31 in a state of covering the outer peripheral side of the coil 320 so as to accommodate the coil 320, the bobbin 312, the fixed core 321, the spring 323, the valve body 34 and the like inside. The housing 31 and the connector 33 are integrally coupled coaxially. The connection portion 43 of the bracket 4, the fixed core 321, the movable core 322, the coil 320 and the bobbin 312 are provided coaxially with the housing 31 and the connector 33.

The fixed core 321 is axially held between the bracket 4 and the bobbin 312 and fixed in a state where the end portion of the fixed core 321 is fitted in the through hole 43 a provided in the connecting portion 43. A spring 323, which is an example of a spring member, is interposed between the housing side portion of the fixed core 321 and the movable core 322. The spring 323 constantly exerts a biasing force that pushes the movable core 322 away from the fixed core 321. The movable core 322 and the fixed core 321 are formed of a magnetic material. The movable core 322 is axially reciprocably supported by the portion of the housing 31 that extends axially from the bobbin 312.

The purge valve 3 is provided with a bracket 4 for fixing to the canister 13. As shown in FIG. 5, the bracket 4 can be manufactured by bending a metal plate. The bracket 4 is a metal member attached to the main body. The bracket 4 may be configured to be integrally provided on the main body by insert molding or the like. The fixing device for fixing the purge valve 3 integrally to the canister 13 is a fixing device including a bracket 4 and a fixing tool such as a bolt 6 or the like.

As shown in FIGS. 5 to 7, the bracket 4 includes at least one of a pair of supporting portions 41 and 42 facing each other, a connecting portion 43 which is a portion connecting the pair of supporting portions 41 and 42, and a pair of supporting portions. The plate-like member is bent and formed so as to be provided with an attaching portion 40 integrally provided in The attachment portion 40 is a flat plate portion extending in a direction orthogonal to the support portion 41 from the lower end thereof. The mounting portion 40 is provided with a through hole 40 a penetrating in the thickness direction. The mounting portion 40 is fixed to the canister 13 by screwing the bolt 6 inserted into the through hole 40 a into the female screw portion provided in the upper wall portion 130.

The support portion 41 and the support portion 42 contact the two side walls opposed to each other in the main body portion from the outside to support the main body portion in a state in which the bracket 4 is mounted on the main body portion. The supporting part opposing direction shown in each drawing indicates the direction in which the supporting part 41 and the supporting part 42 are facing each other. The bracket 4 includes, at one end side, a connecting portion 43 that connects the support portion 41 and the support portion 42. The connection portion 43 has a flat plate shape orthogonal to the pair of support portions 41 and 42, and has the same shape as the side wall of the main body portion on the connector 33 side. The connecting portion 43 is provided with a through hole 43 a to which the tip of the fixed core 321 can be fitted. The connecting portion 43 is in contact with the fixed core 321 in a state where the bracket 4 is mounted to the main body portion, and constitutes a heat path for transferring the heat of the fixed core 321 to the bracket 4.

The support portion 41 is provided with two sets of claw portions 410 at the tip on the other end side opposite to the connection portion 43. The support portion 42 is provided with two sets of claw portions 420 at the tip on the other end side opposite to the connection portion 43. Each of the pair of claws 410 and the pair of claws 420 is two projecting pieces which are opposed to each other in the vertical direction. The pair of claw portions 410 and 420 are provided in two in the vertical direction, one each in the support portion 41 and the support portion 42.

The main body portion is integrally provided with a holding portion 5 for holding the other end side portion of the pair of support portions 41 and 42. The housing 31 has an engaging portion 5 a that engages with the bracket 4, and a holding portion 5 that fixes the bracket 4 to the housing 31 is embedded. As shown in FIGS. 2 to 4, the holding portion 5 is a member embedded in the housing 31 so that the tip end side of the plate member protrudes from the main body portion on the support portion 41 side and the support portion 42 side. The holding portion 5 can be installed by insert molding the housing 31. In each of the tip side portions projecting to the outside of the holding portion 5, engaging portions 5a which are through holes penetrating in the thickness direction are provided. Two engaging portions 5 a are provided in line in the vertical direction on each of the tip side portions of the holding portion 5 protruding from the main body portion.

In the state in which the bracket 4 is mounted to the main body, each of the pair of claws 410 and the pair of claws 420 is fitted into the one engaging portion 5a in a deformed state. That is, the two sets of claws 410 and 420 are crimped in a state of being fitted to the engaging portions 5 a of the respective supporting portions 41 and 42, and the respective supporting portions 41 and 42 and the holding portion 5 are crimped by this caulking deformation. And are connected. As described above, in the state where the bracket 4 is mounted to the main body, the bracket 4 is in close contact with the main body so as to wrap the three side walls of the main body except the inflow port 310 and the outflow port 311 from the outside. The purge valve 3 in a state in which the bracket 4 and the main body are integrated is fixed to the canister 13 so as to be able to dissipate heat by fixing the mounting portion 40 to the upper wall portion 130 with a fixing tool such as a bolt 6.

Next, the effect brought about by the valve device of the first embodiment will be described. The purge valve 3, which is a valve device, includes a fixing device that integrally fixes the main body to the canister 13, and an inflow port 310 that can be connected to the fuel outlet 130 a provided in the canister 13 without using a pipe. The main body portion accommodates the outflow port 311 having the outflow passage 311a which the evaporated fuel from the inflow port 310 does not flow out in the permitted state and does not flow out in the blocked state, and accommodates the coil 320 and the valve body 34. And

According to this valve device, since the inflow port 310 can be connected to the fuel outflow portion 130 a of the canister 13 without a pipe, the fuel supply pipe connecting the canister 13 and the purge valve 3 can be omitted. Therefore, the configuration for sealing the fuel supply pipe and the purge valve 3 and the canister 13 and the configuration for fixing the piping can be omitted, and the number of parts can be reduced and the cost for sealing can be reduced. Furthermore, since the heat generation of the coil 320 can be thermally transferred to the canister 13 through the main body by the structure in which the main body is integrally fixed to the canister 13 by the fixing device, heating of the canister 13 using exhaust heat of the solenoid valve It can be implemented. Therefore, the valve device can promote the desorption of the evaporated fuel adsorbed on the activated carbon by the effect of warming the canister 13, and can improve the vaporization property and the desorption performance. Moreover, the valve device can be fixed without applying a load to the pipe connecting the valve device and the canister 13 by the structure in which the valve device is integrally fixed to the canister 13 by the fixing device. Further, since the number of piping connections can be reduced, the number of assembling steps of the system 1 can be reduced.

The main body of the valve device is fixed to the upper wall 130 of the canister 13. According to this configuration, it is possible to construct a heat path in which the heat generation of the coil 320 and the like is transmitted to the upper wall portion 130 through the main body portion. According to this, the canister 13 can be warmed from the top, which contributes to promoting the desorption of the evaporated fuel on the upper side in the canister 13. It also contributes to the outflow of the evaporative fuel from the inside of the canister 13.

The main body portion of the valve device is fixed to the outflow wall portion of the canister 13 in a positional relationship in which activated carbon is provided between the introduction wall portion of the canister 13 provided with the atmosphere introduction portion capable of introducing the atmosphere. . According to this configuration, it is possible to construct a path for allowing the air adsorbed from the outside to pass through the fuel adsorbed to the activated carbon in the canister 13 and leading it to the outflow wall portion. Releasability can be improved.

The fixing device includes a metal bracket 4 attached to or integrally formed with the main body, and a fixing device for connecting the bracket 4 and the canister 13. The bracket 4 is integrally provided on at least one of a pair of support portions 41 and 42 and a pair of support portions 41 and 42 that contact the main body portion so as to cover opposite side portions of the outer side portion of the coil 320 And a mounting portion 40 fixed to the canister 13 by a fixing tool. The outer portion of the coil 320 is a portion of the main body surrounding the coil 320. At least the support portion 41 and the support portion 42 are in contact with opposite side portions of the portion surrounding the coil 320 in the main body portion.

According to this configuration, it is possible to construct a heat radiation path through which heat generated by the coil 320 and the like is transferred to the canister 13 by being sequentially transmitted through the main body, the support portions 41 and 42, the attachment portion 40 and the fixture. With this heat radiation path, the heat generated from the valve device can be efficiently transferred to the canister 13 via the bracket 4 to contribute to the improvement of the evaporative fuel desorption performance of the canister 13.

The bracket 4 is a portion that connects the pair of support portions 41 and 42 at one end side, and includes a connecting portion 43 that contacts the fixed core 321 or covers the outer side of the fixed core 321 and contacts the main body. The main body portion is integrally provided with a holding portion 5 for holding the other end side portion of the pair of support portions 41 and 42. According to this configuration, while the connecting portion 43 and the pair of support portions 41 and 42 are in contact with the main body portion, the other end side portion of the pair of support portions 41 and 42 is held by the integral holding portion 5 Can. According to this, it is possible to obtain the effect of reducing the thermal resistance in the heat radiation path for radiating the heat of the coil 320 and the like to the canister 13 via the bracket 4.

Since the bracket 4 is formed of a metal plate member, the bracket 4 itself can be bent when an external force acts in the axial direction of the through hole 40a, and elastic deformation is caused to the upper wall portion 130 in contact Can give a reaction force. Therefore, the function of suppressing the thermal resistance in the heat radiation path between the main body and the canister 13 via the bracket 4 is achieved by contributing to the improvement of the adhesion between the mounting portion 40 and the upper wall 130.

The canister 13 integrally includes the above-described valve device. According to this, it is possible to provide the canister 13 having a function capable of controlling the fuel vapor supply amount. The canister 13 integrated with the valve device can reduce the configuration for sealing the valve device and the pipe, and can have a function of utilizing the coil heat generation of the solenoid valve device to promote the desorption of the evaporated fuel.

Second Embodiment
The purge valve 103 of the second embodiment will be described with reference to FIGS. 8 and 9. The configurations, operations, and effects not particularly described in the second embodiment are the same as those in the first embodiment, and only differences from the first embodiment will be described below.

The purge valve 103 of the second embodiment is different from the purge valve 3 of the first embodiment in that the bracket 104 is made of resin and in that it is a part extending from the main body as a part of the main body. The purge valve 103 includes a main body that forms a passage for fluid that is evaporated fuel. The main body portion includes an input side housing portion 1032 having an inflow port 310 for receiving a supply of fluid, and an output side housing portion 1031 having an outflow port 311. The input side housing portion 1032 accommodates the coil 320, the fixed core 321, the bobbin 312, the movable core 322, and the electromagnetic solenoid portion 32 such as the spring 323. The input side housing portion 1032 is located below the output side housing portion 1031 and joined to the output side housing portion 1031.

The output side housing portion 1031 includes an output side flange portion covering an upper opening of the input side housing portion 1032 located on the opposite side to the inflow port 310. The output side housing portion 1031 has an outlet port 311 which is a cylindrical portion projecting to one side of the output side flange portion, and a valve seat 313 provided at the tip of the cylindrical portion projecting to the other side. The output side flange portion is integrally joined in a state where the input side housing portion 1032 is overlapped with the input side flange portion which radially protrudes from the upper opening over the entire circumference. This bonding is performed by melting the resin by laser irradiation and bonding the two. Thus, by integrally joining the input side flange portion and the output side flange portion, the input side housing portion 1032 and the output side housing portion 1031 are joined so that the fluid flowing inside does not leak to the outside. .

The input side housing portion 1032 has a heat radiating portion 1032 a covering the lower side of the coil 320 whose axial direction is the vertical direction and the fixed core 321 and the like. The heat radiating portion 1032 a is a part of the main body of the purge valve 103. The heat radiating portion 1032 a is in contact with the upper wall portion 130 of the canister 13 in a state where the purge valve 103 is attached to the canister 13 via the bracket 104. The heat generation of the electromagnetic solenoid unit 32 due to the energization moves from the coil 320, the fixed core 321, and the like to the heat radiating unit 1032a that covers the outside, and is further transmitted to the upper wall unit 130 to warm the canister 13.

The input side housing portion 1032 includes a bracket 104. The bracket 104 has a mounting portion 140 provided on the tip end side of the leg portion 141 extending downward from the side wall of the input side housing portion 1032, and a leg portion extending downward from the side wall opposite to the side wall extending the leg portion 141 142, and. The mounting portion 140 and the leg portion 142 are grounded to the upper wall portion 130 in a state where the inflow port 310 and the fuel outflow portion 130 a are connected. The mounting portion 140 and the leg portion 142 are provided on the outside of the side wall opposite to each other in the main body portion, and the inflow port 310 is provided between the both. The attachment portion 140 and the leg portion 142 are preferably provided so that the inflow port 310 exists on a straight line connecting the two.

The mounting portion 140 is provided with a through hole 140a for mounting into which the shaft portion of the bolt 6 which is a fixing tool is inserted. The mounting portion 140 and the leg portion 141 are shaped so as to protrude from the main body portion to the canister 13 side, and therefore can bend when an external force acts in the axial direction of the through hole 140 a and contact the upper wall portion 130 Can be given a reaction force by elastic deformation. Therefore, the function of suppressing the thermal resistance in the heat radiation path between the main body and the canister 13 via the bracket 104 is achieved by contributing to the improvement of the adhesion between the mounting portion 140 and the upper wall 130.

According to the purge valve 103 of the second embodiment, the main body portion is provided with a heat radiating portion 1032 a which is a portion covering the outer side of the fixed core 321 and is in contact with the canister 13. According to this configuration, it is possible to construct a heat dissipation path in which heat generated by the coil 320, the fixed core 321, etc. is transferred to the canister 13 through the heat dissipation portion 1032a and the upper wall portion 130 sequentially. With this heat radiation path, heat generated from the valve device can be efficiently transferred to the canister 13, which can contribute to the improvement of the evaporative fuel desorption performance in the canister 13.

The fixing device includes a mounting portion 140 integrally formed as a part of the main body portion, and a fixing tool for connecting the mounting portion 140 and the canister 13. According to this configuration, it is possible to construct a heat radiation path in which the heat generated from the electromagnetic solenoid unit 32 is transmitted from the main body to the mounting unit 140 in the purge valve 103 and the heat is transferred to the canister 13 via the mounting unit 140 and the fixture. The purge valve 103 efficiently transfers the heat generated from the electromagnetic solenoid unit 32 to the canister 13 to contribute to the improvement of the evaporative fuel desorption performance, and can be directly fixed to the canister 13 without using a separate bracket. It can exert its function.

Third Embodiment
The purge valve 203 according to the third embodiment will be described with reference to FIG. The configurations, operations, and effects that are not particularly described in the third embodiment are the same as those in the first embodiment, and only differences from the first embodiment will be described below.

The purge valve 203 according to the third embodiment is different from the purge valve 3 according to the first embodiment in that the bracket 204 includes two attaching portions 40 and 44.

The bracket 204 fixed to the main body further includes a mounting portion 44 extending from the support portion 42 with respect to the bracket 4 of the first embodiment. Therefore, the bracket 204 is fixed to the canister 13 at two points, the attachment portion 40 extending from the support portion 41 and the attachment portion 44 extending from the support portion 42. The mounting portion 44 is, as shown in FIG. 10, a shape that is separated from the lower portion of the support portion 42 in a direction orthogonal to the support portion 42 and further extends away from the support portion 42 in a direction along the surface of the support portion 42 .

The mounting portion 40 and the mounting portion 44 are grounded at a position where the main body portion is placed between the upper wall portion 130 with the inflow port 310 and the fuel outflow portion 130 a being connected. Therefore, the mounting portion 40 and the mounting portion 44 are provided on the outside of the side wall located opposite to each other in the main body portion so that the main body portion or the inflow port 310 is located on the inside. The mounting portion 44 is provided with a mounting through hole 44 a into which the shaft portion of the bolt 6 is inserted. The portion fixed by the fixing tool at the mounting portion 40 and the portion fixed by the fixing tool at the mounting portion 44 are provided such that the inflow port 310 exists between both portions.

According to the purge valve 203 of the third embodiment, the bracket 204 includes the first attachment portion and the second attachment portion integrally provided on each of the pair of support portions 41 and 42 and fixed to the canister 13 by the fixing tool. . According to this configuration, the first heat radiation path, the main body, the support portion 42, and the second heat transfer path sequentially transmit the heat generation of the coil 320 and the like through the main body portion, the support portion 41, the attachment portion 40 which is the first attachment portion It moves to the canister 13 from both the attachment part 44 which is an attachment part, and the 2nd heat dissipation path which transmits a fixing tool in order. With these two heat radiation paths, the heat generated from the valve device can be efficiently transferred to the canister 13 via the bracket 4 to contribute to the improvement of the evaporative fuel desorption performance of the canister 13.

The first attachment portion and the second attachment portion of the bracket 204 are provided such that the inflow port 310 is located therebetween. According to this configuration, since the first attachment portion and the second attachment portion are fixed to the canister 13, each portion located between the first attachment portion and the second attachment portion is attached to the canister 13 It can be stably held. Therefore, even if an external force acts on the purge valve 3, the force received by the inflow port 310 from the connection with the canister 13 can be reduced, which contributes to the protection of the flow path of the valve device. Further, it is preferable that the first attachment portion and the second attachment portion be provided so that the inflow port 310 exists on a straight line connecting the two.

Fourth Embodiment
A fourth embodiment will be described with reference to FIGS. 11 and 12. The configurations, operations, and effects that are not particularly described in the fourth embodiment are the same as those in the first embodiment, and only differences from the first embodiment will be described below.

The fourth embodiment is different from the first embodiment in that the purge valve 3 is fixed to the side wall portion 133 of the canister 113. The side wall portion 133 is a wall portion of the canister 113 extending in the vertical direction and the circumferential direction, which connects the upper wall portion 130 and the lower wall portion 132.

The fuel adsorbed to the activated carbon is purged into the purge valve 3 from the fuel outflow portion 130 a provided on the side wall portion 133 of the canister 113 as the evaporated fuel together with the air introduced into the inside of the canister 113. The side wall portion 133 is an outflow wall portion for flowing the vaporized fuel toward the intake passage. The purge valve 3 is integrally fixed to the canister 113. In the canister 113, the inflow port 310 of the purge valve 3 is connected to a fuel outflow portion 130a which is provided in the side wall portion 133 and from which the evaporated fuel desorbed from the adsorbent flows out. The canister 113 and the purge valve 3 are directly connected without any piping. The side wall portion 133 and the lower wall portion 132 of the canister 113 are in a positional relationship in which activated carbon is provided therebetween.

The mounting portion 40 is fixed to the canister 113 by screwing the bolt 6 inserted into the through hole 40 a into the female screw portion provided in the side wall portion 133. The purge valve 3 in a state in which the bracket 4 and the main body are integrated is fixed to the side portion of the canister 113 so as to be able to dissipate heat by fixing the mounting portion 40 to the side wall portion 133 with a fixing tool such as a bolt 6 .

The main body of the valve device is fixed to the side wall 133 of the canister 113. According to this configuration, it is possible to construct a heat path in which the heat generation of the coil 320 and the like is transmitted to the side wall portion 133 through the main body portion. According to this, the canister 113 can be warmed from the side, which contributes to promoting the desorption of the evaporated fuel on the side in the canister 113.

Fifth Embodiment
The fifth embodiment will be described with reference to FIGS. 13 to 15. The configurations, operations, and effects not particularly described in the fifth embodiment are the same as those of the above-described embodiments, and only differences from the above-described embodiments will be described below.

The fifth embodiment is different from the first embodiment in that the bracket 304 and the fixing tool are fixed to the canister 213 in a state where the purge valve 303 is housed in the housing recess 130b provided in the canister 213. ing.

As shown in FIGS. 13 to 15, the canister 213 includes an accommodation recess 130b formed by a part of a wall portion constituting an outer case of the canister 213. The accommodation recess 130 b is a portion which is recessed inward of the surrounding wall portion in the outer case. The accommodation recess 130 b has a volume having a depth and a shape in which the whole or a part of the housing 31 in which the bracket 304 is mounted fits. A fuel outlet 130a extending in the vertical direction is formed on the wall forming the bottom of the housing recess 130b. The accommodation recess 130 b preferably has a volume having a depth and a shape at least for receiving the fixed core 321.

The bracket 304 includes a mounting portion 340 integrally provided on the support portion 41 and a mounting portion 344 integrally provided on the support portion 42 out of a pair of support portions facing each other. The attachment portion 340 is a flat plate portion extending in a direction orthogonal to the support portion 41 from the upper end thereof. The attachment portion 344 is a flat plate portion extending in a direction orthogonal to the support portion 42 from the upper end thereof.

The mounting portion 340 and the mounting portion 344 are grounded to the upper wall portion 130 at a position where the main body portion is interposed with the inflow port 310 and the fuel outflow portion 130 a connected. Therefore, the mounting portion 340 and the mounting portion 344 are provided on the outside of the side wall located opposite to each other in the main body portion, and provided so that the main body portion and the housing recess 130 b are located on the inside. The mounting portion 340 is provided with a through hole 40 a for mounting through which the shaft portion of the bolt 6 is inserted in the thickness direction. The mounting portion 344 is provided with a through hole 44 a for mounting through which the shaft portion of the bolt 6 is inserted in the thickness direction. The mounting portion 340 is fixed to the canister 213 by screwing the bolt 6 inserted into the through hole 40 a into the female screw portion provided on the upper wall portion 130. The mounting portion 344 is fixed to the canister 213 by screwing the bolt 6 inserted through the through hole 44 a into the female screw provided on the upper wall portion 130. The portion fixed to the fixing portion 340 by the fixing tool and the portion fixed to the fixing portion 344 by the fixing tool are provided such that the main body portion and the housing recess 130 b exist between the both portions.

The support portion 41, the support portion 42, and the connection portion 43 are entirely or substantially entirely accommodated in the accommodation recess 130b in a state where the purge valve 303 is integrally attached to the canister 213. With the bracket 304 attached to the main body, the bracket 304 adheres closely to the main body so as to wrap the three side walls of the main body excluding the inflow port 310 and the outflow port 311 from the outside, and via the attachment portions 340 and 344 It is fixed to the upper wall portion 130. The purge valve 303 fixed to the canister 213 has a mounting portion 340, a heat radiation path from the mounting portion 344 to the canister 213, and a wall forming the housing recess 130b from the main body portion through the support portions 41 and 42 and the connection portion 43. It has a heat radiation route to the part.

The bracket 304 may be in a state of being in contact with or separated from the wall portion forming the accommodation recess 130 b in the canister 213. The body portion of the purge valve 303 may be in a state in which at least a portion is in contact with or separated from a wall portion forming the accommodation recess 130 b in the canister 213. With any configuration, it is possible to construct a heat radiation path from the main body to the wall forming the housing recess 130 b via the support portions 41 and 42 and the connection portion 43.

The valve device of the fifth embodiment is integrally fixed to the canister 213 in a state where a part of the main body is accommodated in the accommodation recess 130 b provided in the canister 213. According to this configuration, it is possible to construct a heat path for transmitting the heat radiation from the portion accommodated in the accommodation recess 130b in the main body to the wall forming the accommodation recess 130b. According to this, since the wall part which encloses a part of the main body part and forms the accommodation recess 130b constitutes a heat dissipation path, the heat transfer area which can heat the canister 213 can be enlarged compared to the above embodiment. . Therefore, the amount of heat transfer to the canister 213 is increased as compared with the above-described embodiment, which contributes to promoting the desorption performance and the vaporization performance of the evaporated fuel in the canister 213.

The valve device of the fifth embodiment is integrally fixed to the canister 213 in a state in which the entire main body portion is accommodated in the accommodation recess 130 b provided in the canister 213. According to this configuration, it is possible to construct a heat radiation path through which heat generated from the coil 320 and the like is transmitted to the wall portion forming the accommodation recess 130 b through the main body portion. According to this, the wall portion surrounding the main body portion and forming the accommodation recess 130b constitutes a heat path, so that the heat transfer area capable of heating the canister 213 can be increased compared to the above-described embodiment. Therefore, the amount of heat transfer to the canister 213 is further increased compared to the above-described embodiment, which contributes to promoting the desorption performance and the vaporization performance of the evaporated fuel in the canister 213.

The valve device of the fifth embodiment is integrally fixed to the canister 213 in a state where at least the fixed core 321 is accommodated in the accommodation recess 130b. According to this configuration, it is possible to construct a heat path in which the heat generation of the fixed core 321 is transmitted to the wall portion forming the accommodation recess 130 b through the main body portion. According to this, the wall portion surrounding the fixed core 321 and forming the accommodation recess 130b constitutes the heat dissipation path, so that the heat transfer area capable of heating the canister 213 can be made larger than in the above embodiment. It contributes to promoting the desorption performance and the vaporization performance of the evaporated fuel.

The valve device of the fifth embodiment is integrally fixed to the canister 213 via the attachment portions 340 and 344 of the bracket 304 in a state where the entire main body is accommodated in the accommodation recess 130 b of the canister 213. According to this, a path for transmitting the heat radiation from the main body including the coil 320 and the like into the canister 213 through the pair of support parts and the connection part and the wall part forming the housing recess 130b, and the attachment part It is possible to configure a path for transmission into the canister 213 via the fixed wall.

Furthermore, according to the valve device of the fifth embodiment, the whole or a part of the main body portion is accommodated in the accommodation recess 130b, so the dimension of the valve device which protrudes from the canister 213 can be suppressed. As a result, the frequency with which the external force acts on the valve device and the magnitude of the external force can be suppressed, and the occurrence of a defect due to the external force can be suppressed.

In the valve device according to the fifth embodiment, the whole or a part of the main body is accommodated in the accommodation recess 130b in a state where the bracket 304 or a part of the main body is in contact with the wall forming the accommodation recess 130b in the canister 213 It is done. According to this configuration, it is possible to reduce the thermal resistance at the time of transferring the heat radiation from the main body to the wall forming the accommodation recess 130 b.

(Other embodiments)
The disclosure of this specification is not limited to the illustrated embodiments. The disclosure includes the illustrated embodiments and variations based on them by those skilled in the art. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiments, and can be implemented with various modifications. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure includes the parts and components of the embodiments omitted. The disclosure includes replacements of parts, components, or combinations between one embodiment and another embodiment. The disclosed technical scope is not limited to the description of the embodiments.

In the above-mentioned embodiment, although the fixing tool for fixing the attaching parts 40 and 44 of the bracket 4 and the canister 13 has been described as the bolt 6, it is not limited to this form. The fixture may be any member as long as the attachment portions 40 and 44 and the canister 13 can be coupled, and, for example, a rivet, a weld joint, or the like can be employed.

The purge valve in the above embodiment is configured to be fixed to the upper wall portion 130 by a fixing tool, but the portion fixed to the canister is not limited to the upper wall portion 130. For example, the purge valve may be fixed to a wall such as a lower wall other than the upper wall 130 and the side wall 133 of the canister.

The purge valve 303 of the fifth embodiment is configured to be fixed to the upper wall portion 130 by the fixing tool in a state of being accommodated in the accommodation recess 130 b, but the configuration is not limited to the configuration in which the accommodation concave portion is provided. . For example, the housing recess may be formed in the side wall portion other than the upper wall portion 130 in the canister, the wall portion such as the lower wall portion, or the like.

The purge valve 303 of the fifth embodiment is configured to be fixed to the upper wall portion 130 by the two attachment portions in a state of being accommodated in the accommodation recess 130 b, but the number of attachment portions is not limited to two. For example, the purge valve 303 of the fifth embodiment may be configured to be fixed to the upper wall portion 130 by one or more attachment portions in a state of being accommodated in the accommodation recess 130 b.

In the embodiment described above, the evaporative fuel purge system 1 is configured to draw evaporative fuel from the canister 13 into the intake pipe 21 by the intake pressure of the engine 2, but includes a purge pump and evaporates using the suction force of the purge pump. The fuel may be drawn into the intake pipe 21. The purge pump is a fluid drive device for purge including a turbine rotated by an actuator such as a motor, and sends the evaporated fuel from the canister 13 toward the intake passage of the engine 2.

In the above embodiment, the purge valves 3, 103 and 203 are described as valve devices integrally mounted on the canister 13. However, the valve devices open and close the passage leading to the intake passage of the engine 2 It is sufficient if the device has a valve that can be switched to The valve device may be an on-off valve that can switch between the fully open state and the fully closed state, and is not limited to a device that switches between the closed state and the open state by driving the valve body using an electromagnetic force. . The purge valves 3, 103, 203 described in the previous embodiments are only one form of valve device that can achieve the purpose of the disclosure.

Although the disclosure has been described with reference to examples, it is understood that the disclosure is not limited to the disclosed examples or structures. Rather, the present disclosure includes various modifications and variations within the equivalent range. In addition, although various elements of the present disclosure are illustrated by various combinations and forms, other combinations and forms including more elements, fewer elements, or only one of these elements Are also within the scope and scope of the present disclosure.

Claims (13)

1. It is a portion having an inflow passage (310a) into which the evaporated fuel desorbed from the canister (13; 113; 213) flows in, and the pipe is not connected to the evaporated fuel outflow portion (130a) provided in the canister An inlet port (310) connectable to the
   A valve body (34) driven by an electromagnetic force generated by energization of a coil (320) to be switched between a permitted state for permitting the evaporated fuel from the inflow port to flow and a blocked state for preventing the evaporated fuel from flowing;
   An outlet port (311) internally having an outlet passage (311a) through which the evaporated fuel from the inlet port flows out in the permitted state;
   A body portion (31) accommodating the coil and the valve body and provided with the inflow port and the outflow port;
   A fixing device (4, 6; 104, 6; 204, 6; 304, 6) for integrally fixing the body portion to the canister;
   Valve device comprising:
2. The valve device according to claim 1, wherein the main body portion is fixed to a side wall portion (133) of the canister (113).
3. A valve arrangement according to claim 1, wherein the body portion is fixed to the upper wall (130) of the canister (13; 213).
4. The body portion is an outflow wall portion of the canister in a positional relationship in which activated carbon is provided between the introduction wall portion (132) of the canister provided with the atmosphere introduction portion (12) capable of introducing the atmosphere. A valve arrangement according to any one of the preceding claims, fixed to 130, 133).
5. The part of the said main-body part is integrally fixed to the said canister in the state accommodated in the accommodation recessed part (130b) provided in the exterior case of the said canister in any one of the Claims 1-4 Valve device as described.
6. The said main-body part is integrally fixed to the said canister in the state accommodated in the accommodation recessed part (130b) provided in the exterior case of the said canister in any one of the Claims 1-4. Valve device.
7. The fixing device includes a metal bracket (4; 204; 304) attached to or integrally formed on the main body, and a fixing device (6) for connecting the bracket and the canister.
   The bracket is integrally provided on at least one of a pair of support portions (41, 42) in contact with the main body portion so as to cover opposite side portions of the outer side portions of the coil and a pair of the support portions. The valve device according to any one of claims 1 to 6, further comprising: an attaching portion (40) fixed to the canister by the fixing device.
8. The bracket (204) comprises a first mounting portion (40) and a second mounting portion (44) integrally provided on each of the pair of support portions and fixed to the canister by the fixing tool. The valve device according to.
9. 9. The valve device according to claim 8, wherein the first attachment portion and the second attachment portion are provided such that the inflow port is positioned therebetween.
10. The bracket is a portion that connects a pair of the support portions to one end side, and includes a connection portion (43) that contacts the fixed core (321) or covers the outer side of the fixed core and contacts the main body portion ,
    The said main-body part is integrally provided with the holding | maintenance part (5) holding the other end side part (410, 420) in a pair of said support part as described in any one of Claim 7 to 9 Valve device.
11. The valve according to any one of claims 1 to 4, wherein the main body portion comprises a heat radiating portion (1032a) which is a portion covering the outer side of the fixed core (321) and is in contact with the canister. apparatus.
12. The valve device according to claim 11, wherein the fixing device includes a mounting portion (140) integrally formed as a part of the main body portion, and a fixing tool (6) for connecting the mounting portion and the canister.
13. A canister integrally comprising the valve device (3; 103; 203; 303) according to any one of the preceding claims.

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